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| 1 | Kelly sideband suppression and wavelength tuning of a conventional soliton in a Tm-doped hybrid mode-locked fiber laser with an all-fiber Lyot filter显示文摘We demonstrate a stable conventional soliton in a Tm-doped hybrid mode-locked fiber laser by employing a homemade all-fiber Lyot filter(AFLF) and a single-wall carbon nanotube. The AFLF, designed by sandwiching a piece of polarization-maintained fiber(PMF) with two 45° tilted fiber gratings inscribed by a UV laser in PMF with a phase-mask scanning technique, shows large filter depth of ~9 d B and small insertion loss of ~0.8 dB. By optimizing the free spectral range of the AFLF, the Kelly sidebands of a conventional soliton centered at1966.4 nm can be dramatically suppressed without impairing the main shape of the soliton spectrum. It gives the pulse duration of 1.18 ps and bandwidth of 3.8 nm. By adjusting the temperature of the PMF of the AFLF from 7°C to 60°C, wavelength tunable soliton pulses ranging from 1971.62 nm to 1952.63 nm are also obtained.The generated soliton pulses can be precisely tuned between 1971.62 nm and 1952.63 nm by controlling the temperature of the AFLF. | JIANFENG LI YAZHOU WANG HONGYU LUO YONG LIU ZHIJUN YAN ZHONGYUAN SUN LIN ZHANG | 2019 | Photonics Research2019，7，2： | 5 |
| 2 | Micro Model of Carbon Fiber/Cyanate Ester Composites and Analysis of Machining Damage Mechanism显示文摘Machining damage occurs on the surface of carbon fiber reinforced polymer (CFRP) composites during processing. In the current simulation model of CFRP, the initial defects on the carbon fiber and the periodic random distribution of the reinforcement phase in the matrix are not considered in detail, which makes the characteristics of the cutting model significantly different from the actual processing conditions. In this paper, a novel three-phase model of carbon fiber/cyanate ester composites is proposed to simulate the machining damage of the composites. The periodic random distribution of the carbon fiber reinforced phase in the matrix was realized using a double perturbation algorithm. To achieve the stochastic distribution of the strength of a single carbon fiber, a novel method that combines the Weibull intensity distribution theory with the Monte Carlo method is presented. The mechanical properties of the cyanate matrix were characterized by fitting the stress-strain curves, and the cohesive zone model was employed to simulate the interface. Based on the model, the machining damage mechanism of the composites was revealed using finite element simulations and by conducting a theoretical analysis. Furthermore, the milling surfaces of the composites were observed using a scanning electron microscope, to verify the accuracy of the simulation results. In this study, the simulations and theoretical analysis of the carbon fiber/cyanate ester composite processing were carried out based on a novel three-phase model, which revealed the material failure and machining damage mechanism more accurately. | Haitao Liu Jie Lin Yazhou Sun Jinyang Zhang | 2019 | Chinese Journal of Mechanical Engineering2019，32，3： | 3 |
| 3 | The formally variable separation approach for the dust-acoustic soli- tary waves with dust charge variation显示文摘 | LIN Chang LI Yazhou LI Kaiming | 2007 | Communications in Nonlinear Science and Numerical Simula- tion2007，12，： | 1 |
| 4 | Wood Crack Detection Based on Data-Driven Semantic Segmentation Network显示文摘Dear Editor, This letter is concerned with wood crack detection which is important to guarantee the quality of wooden products. In the wood industry, the crack detection is one of the most challenging tasks in the wood defects detection, since the detection accuracy may be reduced due to the stains on the boards, the tiny cracks, and some cracks that are similar to the sound region. To overcome these challenges. | Ye Lin Zhezhuang Xu Dan Chen Zhijie Ai Yang Qiu Yazhou Yuan | 2023 | IEEE/CAA Journal of Automatica Sinica2023，10，6： | 1 |
| 5 | Acrolein scavenger dimercaprol offers neuroprotection in an animal model of Parkinson’s disease:implication of acrolein and TRPA1显示文摘Background:The mechanisms underlying lesions of dopaminergic(DA)neurons,an essential pathology of Parkinson’s disease(PD),are largely unknown,although oxidative stress is recognized as a key factor.We have previously shown that the pro-oxidative aldehyde acrolein is a critical factor in PD pathology,and that acrolein scavenger hydralazine can reduce the elevated acrolein,mitigate DA neuron death,and alleviate motor deficits in a 6-hydroxydopamine(6-OHDA)rat model.As such,we hypothesize that a structurally distinct acrolein scavenger,dimercaprol(DP),can also offer neuroprotection and behavioral benefits.Methods:DP was used to lower the elevated levels of acrolein in the basal ganglia of 6-OHDA rats.The acrolein levels and related pathologies were measured by immunohistochemistry.Locomotor and behavioral effects of 6-OHDA injections and DP treatment were examined using the open field test and rotarod test.Pain was assessed using mechanical allodynia,cold hypersensitivity,and plantar tests.Finally,the effects of DP were assessed in vitro on SK-N-SH dopaminergic cells exposed to acrolein.Results:DP reduced acrolein and reversed the upregulation of pain-sensing transient receptor potential ankyrin 1(TRPA1)channels in the substantia nigra,striatum,and cortex.DP also mitigated both motor and sensory deficits typical of PD.In addition,DP lowered acrolein and protected DA-like cells in vitro.Acrolein’s ability to upregulate TRPA1 was also verified in vitro using cell lines.Conclusions:These results further elucidated the acrolein-mediated pathogenesis and reinforced the critical role of acrolein in PD while providing strong arguments for anti-acrolein treatments as a novel and feasible strategy to combat neurodegeneration in PD.Considering the extensive involvement of acrolein in various nervous system illnesses and beyond,anti-acrolein strategies may have wide applications and broad impacts on human health. | Liangqin Shi Yazhou Lin Yucheng Jiao Seth AHerr Jonathan Tang Edmond Rogers Zhengli Chen Riyi Shi | 2021 | Translational Neurodegeneration2021，10，2： | 0 |
| 6 | Biaxial tensile behavior of Ti-6Al-4V under proportional loading显示文摘The biaxial tensile behavior of isotropic Ti-6Al-4 V is characterized in this paper.A novel cruciform specimen was designed and optimized to achieve uniform stress and strain distribution within the gauge area.Biaxial tensile tests were conducted at three different loading ratios by the biaxial testing machine.The Digital Image Correlation(DIC)technique was applied to determine strain distribution,and a high-speed camera was employed to record the fracture process.An Inverse Analysis(IA)approach with a combined experimental and numerical method was proposed to determine the true stresses at the gauge section of the specimen during biaxial tensile tests.The results indicate that the initial yield locus can be described by the Cazacu criterion accurately,whereas the Mises criterion can predict better the strengthening behavior of Ti-6Al-4 V in the first quadrant in the principal stress space. | Lin QI Yazhou GUO Kanghua JIN Huaipu KANG Yulong LI | 2023 | Chinese Journal of Aeronautics2023，36，5： | 0 |
| 7 | Field-scale spatial variability of soil calcium in a semi-arid region:Implications for soil erosion and site-specific management显示文摘Excess calcium(Ca)in soils of semi-arid and arid regions has negative effects on soil structure and chemical properties,which limits the crop root growth as well as the availability of soil water and nutrients.Quantifying the spatial variability of soil Ca contents may reveal factors influencing soil erosion and provide a basis for site-specific soil and crop management in semi-arid regions.This study sought to assess the spatial variability of soil Ca in relation to topography,hydraulic attributes,and soil types for precision soil and crop management in a 194-ha production field in the Southern High Plains of Texas,USA.Soils at four depth increments(0-2,0-15,15-30,and 30-60 cm)were sampled at 232 points in the spring of 2017.The Ca content of each sample was determined with a DP-6000 Delta Premium portable X-ray fluorescence(PXRF)spectrometer.Elevation data was obtained using a real-time kinematic GPS receiver with centimeter-level accuracy.A digital elevation model(DEM)was derived from the elevation data,and topographic and hydraulic attributes were generated from this DEM.A generalized least-squares model was then developed to assess the relationship between soil Ca contents of the four layers and the topographic and hydraulic attributes.Results showed that topographic attributes,especially slope and elevation,had a significant effect on soil Ca content at different depths(P<0.01).In addition,hydraulic attributes,especially flow length and sediment transport index(STI),had a significant effect on the spatial distribution of soil Ca.Spatial variability of soil Ca and its relationships with topographic and hydraulic attributes and soil types indicated that surface soil loss may occur due to water or wind erosion,especially on susceptible soils with high slopes.Therefore,this study suggests that the application of PXRF in assessing soil Ca content can potentially facilitate a new method for soil erosion evaluation in semi-arid lands.The results of this study provide valuable information for site-specific soil conservation and crop management. | Yazhou SUN Wenxuan GUO David CWEINDORF Fujun SUN Sanjit DEB Guofeng CAO Jasmine NEUPANE Zhe LIN Abir RAIHAN | 2021 | Pedosphere2021，31，5： | 0 |
| 8 | Enriching redox active sites by interconnected nanowalls-like nickel cobalt phospho-sulfide nanosheets for high performance supercapacitors显示文摘Although transition metal phospho-sulfides deliver outstanding electrochemical performance,complex preparation methods hindered their further development.Herein,we report a facile one-step electrodeposition approach to deposit interconnected nanowalls-like nickel cobalt phospho-sulfide(Ni-Co-P-S)nanosheets onto the surface of carbon cloth.The thin Ni-Co-P-S nanosheets with multi-components and synergetic effects delivered rich active sites,further enhancing reversible capacitance.Therefore,the as-prepared Ni-Co-P-S electrode materials exhibit excellent electrochemical performance in a three-electrode system,showcasing a high specific capacitance of 2744 F/g at 4 A/g.The full supercapacitors based on Ni-Co-P-S as positive electrode and active carbon as negative electrode showcase a high specific capacitance of 110.9 F/g at 1 A/g,impressive energy density of 39.4 Wh/kg at a power density of 797.5 W/kg in terms of excellent cycling stability(91.87%retention after 10,000 cycles).This simple electrode position strategy for synthesizing Ni-Co-P-S can be extended to prepare electrode materials for various sustainable electrochemical energy storage/conversion technologies. | Kaiyang Zhang Yazhou Xu Yingchun Lin Yushuai Xiong Jun Huang Li Wang Mengke Peng Ting Hu Kai Yuan Yiwang Chen | 2021 | Chinese Chemical Letters2021，32，11： | 0 |
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